Sweet Potato Fries with Toasted Marshmallow Dip

These Sweet Potato Fries with Toasted Marshmallow Dip is the new side dish you didn’t know you wanted. Or even a sweet appetizer to make to snack on (kids love it!!). For all the sweet potato marshmallow casserole fans – this one’s for you!

These Crispy Cinnamon Sweet Potato Fries with Toasted Marshmallow Dip are about to become your new favorite way to eat sweet potatoes. Think crispy, golden sweet potato fries tossed with cinnamon and sea salt, served with the most dreamy, gooey, toasted marshmallow dip. It is sweet, salty, creamy and basically everything you could want in a cozy fall snack or Thanksgiving side dish.

If you love sweet potato casserole with marshmallows on top, you are going to be OBSESSED with this recipe. We are taking all those delicious flavors and turning them into something a little more fun, a little more snackable and honestly, even better.

And can we talk about this marshmallow dip for a second?! Instead of just melting marshmallows, we toast them until golden brown and blend them with heavy cream, vanilla, cinnamon and a little flaky sea salt. The result is this ridiculously delicious, creamy dip with that nostalgic toasted marshmallow flavor. And the best part? It has that gooey, stretchy texture when you dunk a warm sweet potato fry into it.

I cannot think of a better combination for fall entertaining, Thanksgiving or even an after-school snack when you want something extra special. My kids absolutely love anything involving marshmallows, and serving sweet potatoes with a dip like this makes them so much more exciting.

Plus, everything comes together with just a handful of ingredients. Nothing complicated, nothing fancy. Just really good food.

Why You Will Love These Cinnamon Sweet Potato Fries with Marshmallow Dip

There is something about sweet potatoes and marshmallows that just WORKS. The natural sweetness of the potatoes, the warmth of cinnamon and the caramelized flavor of toasted marshmallows make the most incredible combination.

Here are a few reasons why I love this recipe so much:

• Sweet and salty perfection: The sweet potato fries have just enough sea salt to balance the sweetness of the cinnamon and marshmallow dip.
• Made with simple ingredients: You only need sweet potatoes, olive oil, cinnamon, marshmallows, heavy cream and a few pantry staples.
• Naturally gluten-free: No flour, breadcrumbs or complicated gluten-free swaps needed. Just double-check your marshmallow packaging.
• A fun Thanksgiving side dish: Think sweet potato casserole, but in crispy fry form with the marshmallows on the side.
• Kid-friendly and fun to eat: Because what kid doesn’t want to dip fries into toasted marshmallows?!
• Easy to customize: Make the fries sweeter with coconut sugar, add extra cinnamon or adjust the dip until it reaches your favorite consistency.
• Perfect for entertaining: Serve everything on a big platter with the dip in the center and watch it disappear.

And while I love a good classic sweet potato recipe, this one feels a little different. It is nostalgic, fun and something both kids and adults get excited about.

Ingredients You Need to Make Cinnamon Sweet Potato Fries

One of my favorite things about this recipe is how short the ingredient list is. We are keeping things simple and letting the sweet potatoes and toasted marshmallows do their thing.

For the crispy cinnamon sweet potato fries:

Sweet potatoes: The star of the show! I recommend using large, firm sweet potatoes and slicing them into evenly sized fries. Keeping them around ¼-inch thick helps them cook evenly and get those delicious crispy edges.

Extra virgin olive oil: My go-to for roasting sweet potatoes. It helps the fries get golden brown without needing any seed oils.

Cinnamon: Adds that cozy, warm flavor that makes these fries taste almost like dessert. It pairs perfectly with the sweetness of the potatoes.

Sea salt: Do not skip this! A little salt brings out the natural sweetness of the sweet potatoes and balances the marshmallow dip.

Coconut sugar (optional): If you want your fries a little sweeter, sprinkle some coconut sugar over them after roasting. It gives them an almost cinnamon-sugar fry vibe.

For the toasted marshmallow dip:

Marshmallows: The main ingredient in our marshmallow dip! Toasting them before blending gives the dip that incredible caramelized flavor. Use your favorite marshmallows.

Half and half plus milk: Makes the dip rich, creamy and smooth while helping the melted marshmallows become a dip rather than one big sticky mess. I recommend starting with room-temperature cream.

Vanilla extract: Adds a delicious sweetness and enhances the toasted marshmallow flavor.

Cinnamon: A little cinnamon ties the dip together with the fries and gives everything that cozy fall flavor.

Flaky sea salt: Just a pinch makes a huge difference. It cuts through the sweetness and makes the dip taste even better.

How to Make Crispy Cinnamon Sweet Potato Fries

Making homemade sweet potato fries is actually so easy. The biggest trick is giving them enough room on the baking sheet so they roast instead of steam.

Step 1: Preheat your oven. Preheat the oven to 425°F and line two large baking sheets with parchment paper.

Step 2: Prepare the sweet potatoes. Wash and dry the sweet potatoes, then slice them into fries about ¼-inch thick. Try to keep them as uniform as possible so they cook at the same rate.

Step 3: Season the fries. Pat the sweet potatoes dry with a clean kitchen towel or paper towels. Add them to a large bowl and toss with olive oil, cinnamon and sea salt until evenly coated.

Step 4: Spread onto baking sheets. Arrange the fries in a single layer across both baking sheets. Make sure there is space between them! Overcrowding the pan is one of the biggest reasons homemade sweet potato fries turn out soft instead of crispy.

Step 5: Roast until golden. Bake for 25–35 minutes, flipping halfway through, until the fries are tender inside and golden brown with crispy edges. Cooking time will depend on how thick you cut your fries.

Step 6: Add a little sweetness. If desired, sprinkle the hot fries with coconut sugar and an extra pinch of cinnamon.

Now comes the BEST part. The marshmallow dip!

How to Make the Best Toasted Marshmallow Dip

I am telling you, this marshmallow dip is going to be something you want to make on repeat. It tastes like the inside of a perfectly toasted s’more, but in a creamy, scoopable form.

And the toasted marshmallows are really what make this recipe special.

Step 1: Toast the marshmallows. While the sweet potato fries are roasting, arrange the marshmallows in a single layer in a foil-lined, broiler-safe baking dish.

Step 2: Broil until golden. Place the marshmallows under the broiler for about 1–2 minutes, watching them VERY carefully. They can go from perfectly toasted to burnt in seconds. You want the tops golden brown and slightly caramelized.

Step 3: Blend the dip. Immediately transfer the warm toasted marshmallows to a heat-safe blender. Add the room-temperature heavy cream, vanilla extract, cinnamon and flaky sea salt.

Step 4: Blend until creamy. Blend carefully until everything is smooth and combined. If the mixture is too thick, add another tablespoon or two of heavy cream until it reaches your desired consistency. Start on low speed and vent the blender lid according to the manufacturer’s instructions when blending warm ingredients.

Step 5: Serve immediately. Transfer the marshmallow dip to a small bowl and serve alongside the warm cinnamon sweet potato fries.

The dip is best enjoyed warm when the marshmallows are still soft and gooey. As it cools, it will naturally thicken.

My Tips for Making the Crispiest Sweet Potato Fries

Sweet potato fries can be a little tricky because sweet potatoes naturally contain more moisture and sugar than regular potatoes. But there are a few easy things you can do to get the best results.

1. Cut your fries evenly. I recommend cutting the sweet potatoes into ¼-inch fries. Thinner fries will generally get crispier than thick wedges.

2. Soak the sweet potatoes first. If you have an extra 20 minutes, soak the cut sweet potatoes in cold water before roasting. This can help remove some surface starch. Just make sure to dry them REALLY well afterward.

3. Do not overcrowd your baking sheets. Give those fries some breathing room! When they are piled on top of each other, they steam instead of roast.

4. Use two baking sheets. It may seem unnecessary, but trust me. Spreading the fries out makes a big difference.

5. Flip halfway through cooking. This helps both sides get golden brown and prevents the bottoms from becoming too dark.

6. Serve right away. Sweet potato fries are always best fresh out of the oven. They will naturally soften as they sit.

One thing to keep in mind: oven-baked sweet potato fries will have crispy edges and tender centers rather than the exact crunch of deep-fried restaurant fries. And that is totally okay because they are DELICIOUS.

How to Get That Gooey, Stretchy Marshmallow Dip

If there is one thing I want from this recipe, it is that incredible marshmallow pull when you dip a sweet potato fry.

You know what I mean. When you dunk your fry into the dip and the marshmallow stretches as you pull it away? SO GOOD.

The secret is using enough cream to make the marshmallows smooth without adding so much that the dip becomes thin.

Start with the recommended amount of heavy cream and blend everything while the marshmallows are still warm. You want a thick, glossy consistency that clings to the fries.

For an even stretchier texture, start with slightly less cream and add more gradually. The less diluted the melted marshmallows are, the more of that classic gooey marshmallow texture you can preserve.

Just remember that the dip will thicken as it cools, so serving it shortly after making it is key.

Can You Make Marshmallow Dip Ahead of Time?

You can prepare the dip ahead of time, but I definitely recommend making it fresh if you want that gooey, stretchy texture.

Marshmallows naturally firm up as they cool, which means the dip will become thicker after sitting.

If you do make it in advance, store it in an airtight container in the refrigerator for up to 3 days. When you are ready to serve, gently reheat it in the microwave in short intervals, stirring between each, until smooth and warm.

You can also add a small splash of heavy cream if needed to loosen the consistency.

Just know that reheated dip may not have quite the same stretchy texture as freshly toasted marshmallows.

Frequently Asked Questions About Sweet Potato Fries and Marshmallow Dip

Can I make these sweet potato fries in the air fryer?

Absolutely! Air frying is a great option if you want crispy sweet potato fries without heating up your entire oven.

Preheat your air fryer to 380°F and arrange the seasoned fries in a single layer. Cook for about 12–18 minutes, shaking the basket halfway through, until golden and tender. Work in batches to avoid overcrowding.

Can I use mini marshmallows for the dip?

Yes! Mini marshmallows work perfectly. They also tend to melt quickly, making them easy to blend into the heavy cream.

Can I make the marshmallow dip dairy-free?

You can experiment with a rich dairy-free cream alternative, such as full-fat coconut cream. The flavor and texture will be slightly different, and the dip may not have the same stretchy consistency as the heavy cream version.

Do I need to peel the sweet potatoes?

Nope! I actually love leaving the skins on. Just make sure you wash and scrub the sweet potatoes well before slicing.

Why aren’t my sweet potato fries crispy?

The most common reasons are overcrowding the baking sheet, not drying the potatoes thoroughly or cutting the fries too thick.

Make sure to spread them out and roast at a high temperature for the best results.

Can I make the fries sweeter?

Of course! Add an extra sprinkle of cinnamon and a little coconut sugar after the fries come out of the oven. I prefer adding the coconut sugar at the end so it doesn’t burn while roasting.

What else can I serve with marshmallow dip?

This dip is honestly delicious with so many things! Try it with apple slices, strawberries, pretzels, graham crackers or even roasted butternut squash.

You could also use it as a fun dip for a dessert board during the holidays.

How to Store and Reheat Leftovers

If you have leftover sweet potato fries, store them in an airtight container in the refrigerator for up to 4 days.

To reheat, spread them on a baking sheet and warm in a 400°F oven for about 8–10 minutes, or until heated through. You can also pop them into the air fryer for a few minutes to help bring back some of their crispiness.

Store leftover marshmallow dip separately in the refrigerator for up to 3 days. Reheat gently and stir in a splash of cream if needed.

I wouldn’t recommend freezing either component because the textures won’t be quite the same after thawing.

The Perfect Thanksgiving Side Dish (or Dessert!)

I know sweet potato casserole is a Thanksgiving classic, but there is something SO fun about switching things up and serving these crispy cinnamon sweet potato fries with toasted marshmallow dip instead.

They have all the flavors we love about the traditional dish, but in a totally different form.

You can serve them as a side dish, put them out as an appetizer while everyone is waiting for dinner or even serve them as a sweet snack later in the day.

And honestly? I wouldn’t judge you for eating the marshmallow dip straight from the bowl with a spoon.

Whether you are making these for Thanksgiving, a cozy fall weekend or just because you have a few sweet potatoes sitting in your pantry, I cannot wait for you to try this recipe.

The combination of warm cinnamon fries, flaky sea salt and creamy toasted marshmallow dip is truly next level.

If you make these Crispy Cinnamon Sweet Potato Fries with Toasted Marshmallow Dip, let me know what you think! I love hearing when you guys make my recipes, and don’t forget to tag me on Instagram so I can see your creations.

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